Process of producing manganese sulfate.



I I do hereby taining say from UNrrED STATES PATENT OFFICE.

EDWARD w. HASLUP,

me, or

I'ROCESS OF PRODUCING MANGANESE SULFATE.

No Drawing.

To all whom it may concern:

Be it known that I, EDWARD W. HAsLUr, a citizen of the United States, residing at Bronxville, in the county of Westchester and State of New York, have invented certain new and useful Improvements in Processes of Producing Manganese Sulfate; and declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a process of recovering manganese sulfate from low grade manganese ores, or from waste products of metallurgical processes containing manganese, and has for its object to improve the rocedures heretofore proposed.

With this and other objects in view the invention consists in the novel steps and combinations of steps constituting the process, all as will be more fully hereinafter disclosed and particularly pointed out in the claims.

In carrying out this process, I may take a low grade of manganese ore, or a waste product from a metallurgical process 'con- 8% to 20% of manganese oxids, finely divide the same and digest it at, or slightly above say 0., in a solution of ferric or ferrous sulfate, or in a solution of aluminum, chromium, or manganic sulfate Mn(SO,,) The manganese in the ore or waste product is then converte into a manganese sulfate with an efficiency greater than would be the case if a temperature substantially different from 60 C. were employed.

That is to say, I have found that if this temperature is departed from very materially, the amount of manganese sulfate produced will be lessened. The manganese sulfate thus produced may be recovered in any suitable manner, as by drawing off the solution, filtering the same, and evaporating to the point of crystallization. Or said sulfate may be precipitated by means of alkali metal hyrates, or by means of magnesium hydroxid.

This process is especially applicable to manganiferous slags, or residues, 'and low grade tailings from manganese concentration processes.

I have found that a crude ferric sulfate OF BRON'XVILLE, NEW YORK, ASSIGNOR TO HASLUP INEW YORK, N. Y., A CORPORATION OF NEW YORK.

Specification of Letters Patent. Application filed February 2 1918.

- substantially arnacocx,

Patented Sept. 17, 1918.

Serial No. 215,198.

obtained from the treatment of New Jersey green sand with sulfuric acid as desirable to employ in this process, not only on account of its low first cost, but also on account of its efficiency. Said crude ferric sulfate contains ordinarily about 20% of it weight of aluminum sulfate, together with certain impurities, and it is possible that said impurities act catalytically with the mixed ferric and aluminum sulfates to produce satisfac tory results.

\Vhatever may be the real explanation, said crude mixed sulfates of aluminum and iron are found to be so cheap and efficient as to enable the above described process to be commercially feasible on ores that are too low in manganese for commercial success when other and more expensive reagents are employed.

What I claim is 2- 1. The process of extracting combined manganese from low grade material containing oxids of manganese which consists in finely dividing said material; digesting said finely divided material at a temperature 0 60 C. in a solution of a metal sulfate capable of attacking the manganese oxids present; eparating out the crude solution of manganese sulfates thus produced; and recovering said sulfates, substantially asdescribed.

2. The process of manganese from low extracting combined grade material containing manganese oxid which consists in substantially 60 C. in a solution containing ferrous sulfate and aluminum sulfate to---- and recoverform a sulfate of manganese;

1 ing said last named sulfate from the solution, substantially as described.

4. The process of extracting combined manganese from low grade material containing manganese oxids, which consists in finely dividing said material; digesting said finely divided material at a temperature of r In testimonywhereof I allix my signature, substantially 60 C. in a solution containing in presence of two'witnesses. ferrous sulfate and aluminum sulfate den rived from green sand to form a sulfate of EDVARD 5 manganese; and recovering said last named Witnesses:

sulfate from the solution, substantially as M; C. WALSH, described. V FuTrER. 

